Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cot hoc dan slippers" » "co hoc dan slippers", "bot hoc dan slippers", "chat hoc dan slippers", "cot hoc dan slippery", "cot hoc dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cot hoc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cot hoc dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cot hoc dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cot hoc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.